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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-3770) Replace GarbageCollectionLogger with JVM provided GC stats
Date Mon, 04 May 2015 16:23:07 GMT
Josh Elser created ACCUMULO-3770:
------------------------------------

             Summary: Replace GarbageCollectionLogger with JVM provided GC stats
                 Key: ACCUMULO-3770
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3770
             Project: Accumulo
          Issue Type: Improvement
          Components: tserver
            Reporter: Josh Elser
            Priority: Minor
             Fix For: 1.8.0


Hotspot provides some JVM opts that can be enabled which will print out status messages for
garbage collection:

{{-XX:+PrintGCDetails -XX:+PrintGCTimeStamps -verbose:gc}}

TabletServers have the {{GarbageCollectionLogger}} doing its own inspection of heap usage
via {{Runtime}} and also tracking the real interval between calls to itself WRT the expected
interval (to try to guess if there are issues getting resources to run code).

As long as openjdk has support for the same options, I think removing the heap inspection
would be good. Do we still want to preserve the "timeliness" check though? I'm not sure how
valuable it is in real environments.

Thoughts?



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